Kiteworks Alerts Customers to Imminent Attack, Requests 9-Hour Shutdown

Sat, 26 Sep 2026 14:58:08 +0000

Engineer — Act: If you run Kiteworks, follow vendor guidance to schedule the 9-hour shutdown window and review recent access and file-transfer logs for anomalous pre-incident activity before the maintenance window.
SOC/IR — Act: If Kiteworks is in your environment, initiate heightened monitoring of authentication and outbound data events now, and prepare an assume-breach sweep plan for the post-shutdown window given the federal threat intelligence backing this warning.
Leader — Act: Confirm whether your organization uses Kiteworks (note: this vendor’s predecessor Accellion was breached in 2021 affecting dozens of enterprises), assess business continuity impact of the 9-hour outage, and brief leadership before they read about it externally.

Kiteworks on CuraSec